Question

Gastric acid plays a key role in the digestion of proteins by activating digestive enzymes and often has a pH value in the range of 1.5 to 3.5. If the pH of the acid at a given time is found to be 1.25, calculate the molarity of the gastric acid juice.

Answer 1

pH = -log(H^+)

1.25 = -log(H^+)
Solve for (H^+) which will give you the answer in moles/L = Molarity = M